Honeywell 05704-A-0122 Relay Expansion Board

Description

Honeywell 05704-A-0122 Relay Expansion Board

Product Overview

The Honeywell 05704-A-0122 is a 4-Channel Relay Interface Card (PCB Assembly) belonging to the Honeywell / Zellweger Analytics System 57 (5704 Series) gas and fire detection control system.

In the System 57 modular Euro-rack architecture, the 05704-A-0122 acts as the rear-access field wiring interface card. It pairs directly with a 5704 Series 4-Channel Control Card (such as the 05704-A-0144 catalytic or 05704-A-0145 4–20mA control card). It provides screw terminal connections for up to four field-mounted gas or fire sensors and contains configurable electromechanical relays to drive external alarm devices, sirens, shutdown circuits, and PLC inputs.

Technical Specifications

Key Advantages

• High-Density Channel Design: Allows control of up to 4 gas or fire detection channels per 1-inch (25 mm) card slot, significantly saving cabinet space in 19-inch racks.
• Flexible Relay Configuration: Relays can be configured for latching or non-latching, and energized or de-energized operation to accommodate different safety interlocking logic requirements.
• Hot-Swappable Control Card Wiring: Field cables connect directly to the 05704-A-0122 interface card, allowing the main 5704 control card to be removed or replaced from the front panel without disconnecting field wiring.
• Robust Terminal Blocks: High-quality 2.5 mm² terminal connections handle standard industrial instrumentation wiring directly without adapter terminal strips.
• High Industrial Reliability: Built for 24/7 continuous safety-critical operation in harsh industrial environments.

Important Usage & Installation Precautions

• Hazardous Area Location: The 05704-A-0122 card itself is not certified for direct installation in hazardous (Ex) areas. It must be installed in a safe area control room or inside an appropriately rated enclosure (e.g., NEMA 4/IP65 certified with barriers/isolators if wiring into Ex zones).
• Power Isolation: Always de-energize the System 57 rack power supply prior to inserting, removing, or wiring the interface card to prevent electrical arcing or card edge damage.
• Relay Contact Load Limits: Do not exceed the maximum contact rating (5 A resistive load). High-inductive AC/DC loads (such as heavy-duty solenoids or large motor starters) require interposing relays or RC snubber suppression circuits across the contacts.
• Firm Card Alignment: Ensure the card is properly aligned with the Euro-rack guide rails and fully seated into the backplane connector before tightening the card securing screws.
• Proper Grounding & Shielding: Ensure sensor cable shields are grounded at one end (typically at the rack earthing bus) to prevent ground loops and electromagnetic interference (EMI) on the analog loops.

Applications

• Oil & Gas Refineries & Offshore Platforms: Centralized monitoring of toxic/combustible gas detectors and flame detectors.
• Chemical & Petrochemical Processing Plants: Multi-point gas hazard monitoring connected to plant emergency shutdown (ESD) systems.
• Water & Wastewater Treatment Facilities: Detection of chlorine (Cl2Cl_2Cl2​), hydrogen sulfide (H2SH_2SH2​S), and methane (CH4CH_4CH4​) in pump rooms and processing areas.
• Manufacturing & Automotive Spray Booths: Real-time monitoring of volatile organic compounds (VOCs) and solvent vapors to trip ventilation systems.
• Power Generation & Substation Battery Rooms: Combustible hydrogen (H2H_2H2​) detection and alarm relay triggering.

Shipping Port: Xiamen, China

Payment: Bank of Chicago, Bank of Singapore

Express cooperation: fedex, DHL, UPS and your express account

Service: Professional Sales provides 24 hours /7 days online service

Please make an inquiry for more models：